The team take on an entertaining new challenge when they plunge into the fast-growing market for rock music memorabilia. Can they prove that a curious silver guitar once belonged to Ronnie Wood of the Rolling Stones - and could a baby grand piano now owned by 90s pop star Chesney Hawkes, have once belonged to John Lennon of the Beatles?
It's an investigation that leads them to some colourful characters from the 1970s music scene, but with memories very hazy in the era of the Beatles and the Stones, can the team get any closer to the truth?
